diff --git a/configure.in b/configure.in
index c4f7fc8a..d2aec317 100644
--- a/configure.in
+++ b/configure.in
@@ -190,7 +190,7 @@ AC_LIB_LINKFLAGS(ltdl)
 
 saved_LIBS="$LIBS"
 LIBS="$saved_LIBS $LIBLTDL"
-AC_CHECK_HEADER([ltdl.h], [ AC_MSG_RESULT "yes" ],
+AC_CHECK_HEADER([ltdl.h], [AC_MSG_RESULT([yes])],
    [ AC_MSG_ERROR([ltdl.h not found, please install libltdl and/or libtool]) ])
 LIBS="$saved_LIBS"